Robert l



(No Model.)

R. L. BAROLAY. DROP HAMMER.

Patented Sept. 15,1891.

mn www UNiTED STATES ri-TENT Nlirica.

ROBERT L. BAROLAY, OF BROOKLYN, NEIV YORK, ASSIGNOR TO MANNING MERRILL .AND EDWARD IV. MERRILL, OF SAME PLACE.

`DROP-HAMMER.

SPECIFICATION forming part of Letters Patent No. 459,607, dated September 15, 1891.

Application filed November 28, 1890. Serial No. 372,983. (No model.)

T0 all whom it may concern:

Be it known thatI, ROBERT L. BARCLAY, of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Drop-Hammers, of which the following is a specification.

I will describe in detail adrop-hammer enibodying myimprovement and then point out the novel features in the claim.

In the accompanying drawings, Figure lis an elevation in perspective of a portion of a drop-hammer embodying my improvement. Fig. 2 is a vertical section taken on the line a: Fig. l.

Similar letters of reference designate corresponding part-s in' all the figures.

My improvement relates to that class of drop-hammers in which the hammer is raised by means of a board passing between frictional rollers. The friction of the rollers on each side of the board raises the hammer, and when the rollers are separated the hammer is free to fall.

In the drawings, A designates the hammer, and B designates the board by which the hammer is raised.

C designates the rollers between which the board passes and by which it is elevated. These rollers are j ournaled in suitable boxes in heads D, secured to uprights D', constitutingthe side frames of the machine, and

also acting as guides for the hammer. Each roller is driven from a separate driving-pulley D2, operated in any suitable manner.

E designates a trip by which the hammer may be maintained in an elevated position after it has been raised, and E designates a rod by which the trip may be released to allow`the hammer to fall. The shaft of one roller is eccentrically journaled, as at O', Fig. 2. IVhen the eccentric-journal is rotated in one direction it operates to move its co-operating roller away from the board, so that the board and hammer may drop after havingbeen raised.

F designates a rod by which the rocking of the said eccentric-journal may be effected. One of the rollers C may be adjusted toward and from the other by means of adjustingscrews and bolts c, a. As the parts just de- 5`o scribed do not constitute my invention, broadly considered, I have referred to them thus briefly. It will be observed that the heads D are secured t0 the uprights D by means of bolts CZ, and also that the journals for the rollers C are arranged in the heads D. The operation of the drop occasions great strain. upon the heads D, so much so that heretofore no means has been devised which,

while allowing a free action of the parts, 6o

would still obviate breakage of said heads. All attempts to connect said headsV together from their upper sides-as, for instance, by solid casting or by boltshave proven abortive, as the strain transverse to the length of said casting or bolts, due to the rocking n10- tion of the heads, would quickly snap the connecting castings or bolts or else break off the lugs or other projections by .which the bolts might be secured. I have discovered 7o that by connecting the heads together by a single connection,arranged so as to connect them from their under sides and atone side of the macl1ine,when used in conjunction with other connections extending from the upper sides of the heads, all the difficulty heretofore experienced is obviated. The connections which I have found most expedient consist of tie bolts or rods G, extending between the heads D and over the rollers C, 8o

said tie bolts or rods being connected to lugs or projections g, extending upwardly from the heads and which are cast integral therewith. The other connection consists of a tie bolt or rod G', extending between the heads 85 and below the roller C, arranged lat the rear of the machine. This tie bolt or rod is connected to lugs g', extending downwardly from the heads D and made integral therewith.

What I claim as my invention, and desire 9o to secure by Letters Patent, is-

In a drop-hammer, the combination, with uprights, of heads bolted to the upper ends of said uprights, rollers journaled in said heads and adapted when rotated to raise a board and hammer, said heads being pro- VIded ilpon their upper sides with lugs or or projections and extending beneath .one of proJeotlons made integral therewith, tie bolts said rollers, substantially as specified. or ro'ds secured to said projections and eX- Jtendlng over said rollers, other lugs or pro- 5 Jections made integral with said heads and Vtnesses:

extending downwardly therefrom, and a tie FREDK. HAYNES, bolt or rod connected to the last-named lugs JOHN BICKET.

ROBERT L`. BARCLAY. 

